KR970050359A - Integrated dual focus optical pick-up device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dual focus optical pick-up apparatus for recording a signal on a disc having a thickness of 1,2 mm and an optical data recording medium having a thickness of 0.6 mm, and reproducing the recorded information as an electric signal. The present invention relates to an integrated dual focus optical pick-up device that can contribute to ease of assembly and adjustment and light and small size, which are integrally formed with an optical element.

To this end, in a dual focus optical pick-up apparatus for recording signals on optical data recording media of first and second disks having different thicknesses, and reproducing the recorded information as electrical signals, a plurality of optical elements are placed. A silicon substrate, a laser diode generating a laser beam at a predetermined wavelength, an integrated body formed on one side of the silicon substrate, the support having a heat dissipation function, and having a heat dissipation function, an integrated body formed on the other side of the silicon substrate. Reflective prism reflects the beam emitted from

The first and second photodetectors disposed at both sides of the support at predetermined intervals and integrally formed on the silicon substrate to detect optical information of the disks returned through the reflective prism, are formed on one side of the reflective prism. A diffraction grating that diffracts the emission beam of the laser diode into three beams, a hologram lattice that is integrated on the reflective prism and generates a focus error on the incident laser beam, and is formed on the silicon substrate and Plastic case for sealing the optical element is formed of a dual focus lens formed on a predetermined portion of the plastic case to form a beam focus on the first and second disks having different thicknesses.

Description

Integrated dual focus optical pick-up device

As this is a public information case, the full text was not included.

1 is a data recording state according to the type of disc,

2 is a block diagram of a conventional dual focus optical pick-up device,

3 is a block diagram of an integrated dual focus optical pick-up device according to the present invention;

Claims (1)

A silicon substrate in which a plurality of optical elements are placed in a dual focus optical pick-up apparatus for recording signals on optical data recording media of first and second disks having different thicknesses, and reproducing the recorded information as electrical signals. 61) a laser diode 63 for generating a laser beam at a predetermined wavelength, an integrated body formed on one side of the silicon substrate 61, and the laser diode 63 is placed therein; a support 62 having a heat dissipation function; and the silicon substrate Reflective prism 64 integrally formed on the other side of the upper portion 61 and reflecting the beam emitted from the laser diode furnace 63. The reflective prism 64 is disposed at predetermined intervals on both sides of the support 62, and the upper portion of the silicon substrate 61. First and second photodetectors 66a and 66b integrally formed at one side of the reflective prism 64 to detect optical information of the disk returned through the reflective prism 64, and formed on one side of the reflective prism 64. A diffraction grating 65 diffracting the emission beam of the beam 63 into three beams, a hologram grating 69 generating a focus error on the incident laser beam formed on the reflective prism 64, and the half A plastic case 67 formed integrally on the silicon substrate 61 to seal the plurality of optical elements. An integrated dual focus optical pick-up device formed of a predetermined portion of the plastic case (67), the dual focus lance (68) for forming beam focus on the first and second disks having different thicknesses. ※ Note: The disclosure is based on the initial application.